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Suma a patru numere consecutive este 164.Determinati nr

Răspuns :

a+(a+1)+(a+2)+(a+3)=164
4a+6=164
4a=164-6
4a=158
a=158÷4
a=39,5
a+1=39,5+1=40,5
a+2=39,5+2=41,5
a+3=39,5+3=42,5
39,5+40,5+41,5+42,5=164